Diamond wheel dresser



Feb. 13, 1945. s. M. POLLARD ET AL DIAMOND WHEEL DRESSER Filed Feb. 26, 1943 Jwni'ur fiianLa MFuLLar Patented. Feb. 13, 1945 "UN D ST E's PATENT omcey DIAMOND WHEEL Stanley Martin Pollard and Victor William Winde blad, New Westminster, British Columbia,

Canada Application February 26, 1943, Serial No. 477.284

In Canada January 4,1943

. 2 Claims. (015125 11) 1 ."lhisi nvention relates to a dresser for grinding wheels. I i 1 .An object of the present invention is the provision. of a dresser for grinding wheels having peripheral surfaces of any shape. l Another object is the. provision of a device particularly for dressing grinding wheels having peripheral surfaces. of irregular shapes.

' Another object is the provsion of a dresser Icapable of accommodatinggrinding wheels of different sizes. i i ,,A further object is the provision of a dresser which may be easily adjusted for grinding wheels having different peripheral shapes. l A still further object is the provision of a device capable of keeping the peripheral surfac e of a grinding wheel exactly in its original shape.

Yet another object is the provision of means for producing a template of the exact sectional shape of the surface of any grinding wheel for use in a dressing device.

Still. another object is the provision of a device 'of the nature described of extremely simple. construction and which mayreadily be mounted.

adjacent a grinding wheel. 2

. to beheld adjacent the wheel in any suitable 1 into the 'guard. l i p Ahollow boss 2| extends transversely of the- Figure 4 is anenlarged section taken substantially on the line 44 of Figure 3, and

Figure 5 is an enlarged plan view of the slide.

Referring more particularly to the drawing, I is a grinding wheel having a peripheral grinding surface ll of any desire'd shape. A dresser, generally indicated by the numeral l 2, is adapted manner. Asmost grinding wheels are: provided with a guard, such as guard l3, it is'preferable to mount the dresser thereon. i

r The dresser l2 includes spaced side plates [4 and I of any required shape connected togetherat their outer edges by a strap IS. A base I! hav-; ing alined longitudinal slots l8 adjacent its opposite ends, fits alongthe curved top of the guard Hand is retained in place by set screws which extend through the slots I8 and are base llsubstantially midway between the ends thereof. Each of the sides'll and I5 is provided withone or more holes 22 arranged substantially l A; further object isthe provision of a grinding wheel dresser which may be adjustably mounted on. the guard of the wheel and which, when desired, may be movedto a position where it will not interfere with the normal operation of the wheel.

- With these and other objects in view, the

present invention consistsessentially of agrindingwheel; dresser comprising a track, means adapted to hold the track adjacent the shaped peripheral surface of a grinding wheel,.an edge of said track being the same shape as ;the sec: tional contour of the grinding surface and equally spaced therefrom at all points, a slide movably mounted on the track, a cutting element carried by the slide and extending to the grinding surface when the dresser is in operative position;

and means on the slide for co-operating with, said track edge to maintain the cutting element in its correct position in relation torthe grinding surfac during movement of the slide back and .forth on the track, as more fully described and;

. parallel section 34 whichr is' secured to the ghori zontal portion of a right angle bracket35, the:

illustrated by way of example in the following specification and the accompanying drawing, in

which X l Figure 1 is a side elevation of a dresser mounted on the guard of a grinding wheel,

- Figure 2iis an end. elevatidn of the dresser,

jFigureeis anenlargedplan view of. th track and slide,.the cover of .the latter being removed,

in an-arc, and abolt23 extends through corresponding holes in the sides and th boss 2|.

A nut 24 is threaded on the end of the bolt to hold the latter and. consequently, the dresser in place. With this arrangement, the sides l4 and 15, which form a holder, are pivotally mounted on the guard, and the end of an adjusting bolt 25 threaded through the strap It bears against the base I! or, as shown, the guard, to retain the holder in any desired position in relation to thegrinding wheel. l

A track 30 is fixedly or pivotally surface I I.

grinding surfaceand equally spaced therefrom at all points, as clearly illustrated in Figure 3.

The other edge 32 of the track may be exactly the same shape as the edge 3t or it may only approximate, said shape.

wardly over itself at 33, se Figure 1, to form a vertical portion of which is pivotally securedto one of the sides [4 or 15 by means of a pivot 36.

. v A threadedpin 3'! extends outwardly from each of the sides through an arcuate slot 38 formed in the vertical portion of one of the brackets 35 with the. Nuts 40 are threaded on the pins3'l tohold the brackets in any desired position. Whenthe brackets 35. are.

pivot 36 as its centre of curvature.

threaded mounted on the bottom of the holder adiacentthe grinding This track has an edge 3| which is the same shape as the sectional contour of the In this example, each end of the track 30 is bent upwardly and rearwith.

in its proper position.

pivoted within the limits of the slots 38, the track is tilted with them.

A slide 44 is movably mounted on the track 30. This slide consists of a casing 45 which preferably has a, tapered inner end 46 and a, peripheral wall 41, in which opposed openings 48 are formed at opposite:sides d'ftheslide. vAtray 56fhavingza back rid'es infa recess-52 formed inthe doottom of the casing, and springs 53 lying between said back and the end wall ofthe casing urge the tray towards the inner end 54 of the recess152. .h pair of rollers 55 are mounted on the tray adjacent its inner edge and project outwardly over sa'id edge,

tom of the casing 45 near its inner end 46. The

space between the rollers :55 and 56 zis [in line. with the openings 48 of the casing wall. ;iA.cover 51 is removably mounted on the casing in any suitable manner. this mover-fits ,runder Ilugs -.58 @1103 ectin'gupwardly from the Wall, and'lugsfifltextendingrupwardly from. said wall at the outersendiofithe casingzare its correct position in relation to the grinding surface owing to the fact that the edge 3| of the track is the same shape as said surface and equally spaced therefrom at all points. As the slide moves along the track, it turns so that the rod 62 always points toward the wheel. The

springs E53 cooperate withttherdllers 55 and 56 by pivoting the brackets 35. It has been found ithatiwhenfthe di'amond becomes too flat in its while a single roller 56 is mounte don the"bot "normal positionfasrshown in Figure 1, it may be tilted to an angle of approximately fifteen deagrees :to ithe ihnrizontal, in order to sharpen it.

I lThis is-"done while the diamond is still dressing In Figure 5, the inneren'd o'f bentlover the cover. slisdesiredranotherslug 60 may (be formed on the outer edge cof ithe mover and bent rdownwardlyzover the I end :o'f .thel casing. A cutting element r6l' is mounted on tthe top .Of the cover -4'l in any suitable :manner, .In this example, the cutting lelementlcconsists of :armd 62, which may :be threaded, :as :shown, .extending through alined bosses ,63 'carr'iedtby ,the cover'zat its inner and Jouter.. ends, neither "one -:or mom of said ibnsses being iinternally threaded. The rod 62 .has :a .head -164at its router :end and .is

formed -with a, -.taper 55 Eat rits'zinner aenii', the apex ,of whichis .located as. :commercial adiamond166. l

.The .slide -44 iiS mounted .011 the attack .With

the latter extending through thexnpeningsfill-8 and between .therellers -55 Land 56., Theirollers 5.5 are pressed against dzhe edge :32 iOf the track by :the springs :53, while the roller 5361s drawn againstJthe edge l bythe actionuofzsaidsprings. When the slide is kthus mounted :on the,,=track, the cutting element 61 extends sdirectly :towards the-grindingsurface vt1 of the'xwheel so .tha't-uthe diamond *6timayqhegmoved into contact there- ,lfithe-idresseriis mountedlon ztheeguard W3, as shown, :a millrality of vertical marks *fi'l one ifor each (hole 22, may be ;placed on :the guard iadjacent the edge -68 of one .or both sides l4iand, 15, said edge-being vertical when therholder lis .-In:use, @the holder Iis pivotally'imounted 1m the base ill. which, in turn isnnounted on :thezguard L3, m'h slots .-,l 8,-permitithe-'base:to bekadius'ted on the guard, [and -.the position :of the holder relation to the base may be .changedzby uxsing difierent sets :of holes 3'2. .NVhen Tithe .difilder is -arranged with the edge :68 2of E0118 f the:sides M -or 1.5 in line with the appropriate imark iii],-

the diamond '66 :bears against or is positioned near :the grinding 'sunfaoe ill -;of lthe wheel 3H]. Any :fin'e;adj.us.tme1it of athe. h'olderzmay zbeimade Ely-means of the ;boltl25. flthe :rndiliZ imiaydre turned to set and zmain'tain' the cdiamond in its correct position .in :relationito the grinding :s'ur-' face. iIhe bracket :351is J-pneferabIy set isotfthat the *cutting element :fil :poirrts downwardly :at

least two 'or :three :degrees rhelnw tthexhoriaontal in order to {prevent achattering with the wheel rotating: in the direction-10f vtheiarrowr in Fig'ure '21.

As the slide 44 its smoved hack :and forth :nn zine track '30. .tthe :diamo'nd. liS falways maintained iin' the .wheel. I

"The peripheral surface of the grinding wheel may :he :any :desired :shape, it is only :necessary to make the edge of the track the sameishape as said surface. lngoorlwayrto obtain :a template :for :the track is to :press 'Lthe sedge :of a piece of metal :against the :grinding :surface until :the ilatt'ergrinds iits way {well into the metal. This produces the xexactwsh'ape "of th'e surface. The :track may then :he :shaped Idesired :by ithe use :of the itemplate land =Ltransfer ring to lthe metal 'from which the track is to Ibe' cut an outline obtained by moving a point a lfixeil distance frnm the profile :of the :templa'te. track 11s made large senou'gh to accommodate wheels of different :thicknesses, while larger or smaller "tracks Lmay Joe used :for :difierent 'purposes. The difier-ent, adjusting means .0T this device :enable it i to he used in this manner. It is a very simple matter :to :change the track for one 'of a different size nor shape, whichever is required. No-matter how badly a wheel (is worn out of shape, this device will dress "it'into its :exact original :shape since Lthe itrack remains the same and-the cutting e'lement may'ibe moved inwardly if the wheel :has become smaller in diameter and thickness.

When not required, i the dresser imay be iswung up out'cof @the may 'on ithe p'ivot bolt 23. .J-AS the sidm .I-4 'and l5 are outside the "guard l8, thedresser will'rturn almost upside*down.

Various :modifications zmay ibe made in thisinvention without departing from the spirit thereof or the escaped the claims, and therefore "-.the exact forms =tshown are 'to be taken as iliustrative only and notlin a limiting sense, and

it :is desired that only ==such limitations 1 shall be' 1. In -a gr inding wheel dresser of --"the :character d escri'bed a track having -a shape definecl by moving a point a fixeddistance fromthe wvhe-l profile, a1 slide "on the i trackhaving a single' roller engaging the insi'de of the track :and a p'air qofrollersengaging the outside o'f the ttmc k means for forcing the 1 pair of rollers with spring pres-- sure. against the track, :a :cutting eelement oar-f ried byitheslide a bracket on theitraeh: alholiler,

means for pivoting ithe :bracket 'rto'rthe Jhzolrler and :ifor holding .it :in adjustable position, sand means for adjustably supporting theholdersfrom" theguard'ofiaigrindingwheel;

2. A grinding wheelrdressernomprisingla wheel. guard, 'la base tiplate i'itav'ing ta kmss nthereinzaii- The rollers adapted to engage the outer side of the VIC'IQR. WINDBLAD.

n. 2,869,405 t n 3 bolt adapted to extend through one of the pair of track and a, single roller adapted to engage the said holes and through the boss on the base the inner side of the track, means for forcing member, bracketspivotelly mounted on the side the pairfof rollers against the outer side of the plates of the holder having slots therein and track, a. cutting element including a threaded rod clamping bolts extending through the slots, a 5 and aligned bosses on the slide engaging and track carried by the brackets having a contour supporting the rod. t v corresponding to that of the wheel to be dressed, n t

a slide mounted on the track having a, pair of STANLEY MAR'I'INPOLLARD. 

